Third party RFQ software?

For the business I'm currently at there's just no way that Vantage/Epicor 9 could handle the work that needs to go into RFQ's (in regards to the volume, handling customer + our own + manufacturer part numbers, performing lookups and matches, a portal for suppliers that's actualy any use (supplier connect's awful)), so we need a third party product to assist us.

The front runner at the moment is called 'QuoteWin' from 'PolyDyne Software', has anyone here any experiance of it, or what are others using if they have outgrown the native RFQ funtion ?.

Thanks.